<span>The question is asking us whether it is true that nonnative species disrupt the natural variability of an ecosystem. This is true. A famous example is the introduction of cats to Australia: they are non-native species and they hunt the native species, therefore reducing the species variability in Australia.</span>
Answer:
Cell differentiation is the process by which dividing cells change their function. DNA is essential in gene expression, which gives the ability of cells that are specializing to be able to adequately perform the role they are trying to carry out. It is generally understand that all the cells in our body contain the same DNA, yet they carry out different functions. The key is understanding that specific parts/combinations of the genome are activated which changes the function and shape of the cell. Additionally, if the DNA is damaged or mutated in certain areas of the chromosome, it can cause certain differentiated cells to not function properly.
Explanation:
Some produce greenhouses gases and promote warming of our planet through the greenhouse effect, while others reduce the amount of greenhouse gases promoting cooling of our planet.
Answer:
Fish and meat are important sources of protein and fat, though most non-coastal bears rely on carrion (including winter-killed animals)
Explanation:
Some bears, become very effective predators on newborn elk, moose, deer or caribou. Others live in areas where salmon, su.ckers or other fish spawn for part of each year.
When bears emerge from their dens in the spring, food is in short supply. Although bears are hungry, most trees and shrubs won’t leaf for another month and only the grass at lower elevations has begun to green up.
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Answer:
C) a carbohydrate that takes longer to break down in the body puts less sugar into your bloodstream
Explanation:
Whole grains are a more complex carbohydrate than your basic white bread, meaning it takes longer to break down and doesn't flood your bloodstream with sugar the way white bread does when eaten. (also, the other three are not very closely related to/answer the question)
